If an elephant used toothpaste, this is probably what it'd look like! Working with an adult, kids can learn about chemical reactions by watching this heat-producing mixture bubble and overflow for up to half an hour.

WARNING: This experiment uses chemicals that can irritate skin and damage clothes, so make sure to use safety goggles, lab apron, and nitrile gloves. Avoid touching or getting the chemicals on skin or clothing. And don't get too close, as heat and steam can be dangerous.

YOU WILL NEED

For each "tube of toothpaste" (otherwise know as the bottle with a reaction inside):

• 16-ounce empty plastic soda or water bottle with narrow neck

• foil cake pan with 2-inch sides

• funnel

• ½ cup 20-volume peroxide, sold in a beauty supply store; needs to be a 6 percent solution